the bottom white cover where the usb etc is loose and can be pulled out to expose the inside but does not seem damaged. i had this black screen problem before and eventually it started by holding down the far most left button with power button.. it never got wet and i handled with care... it seemed more like when i removed the usb cable it seemed to pull on it and the glue or whatever seemd to loosen but it still closes if i choose to

i have the newest modded firmware on it but i do not know how to utilize my sd card especially if i cannot start it nor can i get anything on via charging via ac or connecting to pc.